23190978 has 16 divisors (see below), whose sum is σ = 47075040. Its totient is φ = 7614816.

The previous prime is 23190977. The next prime is 23190983. The reversal of 23190978 is 87909132.

It is not an unprimeable number, because it can be changed into a prime (23190977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28443 + ... + 29246.

It is an arithmetic number, because the mean of its divisors is an integer number (2942190).

Almost surely, 2^23190978 is an apocalyptic number.

23190978 is an abundant number, since it is smaller than the sum of its proper divisors (23884062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23190978 is a wasteful number, since it uses less digits than its factorization.

23190978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57761.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 23190978 is about 4815.7011950494. The cubic root of 23190978 is about 285.1716540567.

The spelling of 23190978 in words is "twenty-three million, one hundred ninety thousand, nine hundred seventy-eight".